Panasonic PT-MZ770 / PT-MW730 (serv.man3) Service Manual ▷ View online
DIS-21
SECTION 2 DISASSEMBLY PROCEDURE
<MZ770/MW730>
3. Optical Parts Disassembly
r
Disassembly flow chart
2.2. Top slide cover removal
2.4. Top cover removal
Completed product
3.2. Optical block removal
3.1. Prism cover removal
3.3. Polarizer (In) removal
3.2.1. Polarizer (Out) removal
2.7. Terminal cover removal
3.4. Lighting case top removal
2.8. V, S-PCB, A/NT-PCB block removal
3.5. PBS, integrator lens removal
3.6. Parts location and direction in the lighting case
• The ball-pointed driver (2.0) and Torx driver (T10) are required to disassemble.
• Before taking the procedure below, remove the Top slide cover,Top cover, Terminal cover, Front cover,V/S-PCB,
A/NT-PCB block removal, and perform the disassembling following to the chart below. The items indicated with
gray background show the disassembling at SECTION 2 DISASSEMBLY PROCEDURE.
DIS-22
SECTION 2 DISASSEMBLY PROCEDURE
<MZ770/MW730>
3.1. Prism cover removal
1. Loosen 1 torx screw-A with torx driver (T10) and take the prism cover off.
A
3.2. Optical block removal
1. Disconnect the FFC cables connected to the A-PCB.
2. Loosen 3 hex screws-A with ball pointed driver (2.0) and take the Optical block upward off.
A
Prism cover
Ball pointed driver
Optical block
Pay attention not to scratch on the surface of polar-
izer (In) when removing the Optical block.
A
A
Note on FFC cable mounting or dismounting
To mount the Flexible Flat Cable (FFC cable) of LCD panel
to the connector on the board, a special inserting jig must
be used. If not used, there is a possibility of cable incom-
plete mounting or break of cable.
For further instruction of mounting and dismounting, refer to
the item [4. 2. 6. Mounting and dismounting the FFC cable
of LCD panel] of SECTION1 SERVICE INFORMATION.
For PT-MZ770
DIS-23
SECTION 2 DISASSEMBLY PROCEDURE
<MZ770/MW730>
3.2.1. Polarizer (Out) removal
1. Remove each 1 hex screw-B on the polarizer holder with a ball pointed driver (2.0) and
take the Polarizer (Out) upward off carefully.
B-Polarizer (Out)
(Inorganic type)
G-Polarizer (Out)
(Inorganic type)
R-Polarizer (Out)
(Inorganic type)
Al evaporated side
(light incoming side)
Al evaporated side
(light incoming side)
Al evaporated side
(light incoming side)
Important notice on the Optical block replacement
LCD panels used for this model cannot be replaced separately. Do not disassemble the Optical block. These LCD
panels are installed with precision at the factory. When replacing the LCD panel, should be replaced whole of the
LCD panels and prism assy at once. When replacing optical block, take the optical and electrical adjustments fol-
lowing to the chapter "Adjustment".
B
Pay attention not to scratch on the sur-
face of the Polarizer (Out) when remov-
ing the polarizer.
Torque: 2.5 ~ 3.5 kgf.cm
DIS-24
SECTION 2 DISASSEMBLY PROCEDURE
<MZ770/MW730>
Note on handling of inorganic polarizer
This projector provides high durable inorganic polarizer which have a rib shaped evaporated aluminum on the glass
surface. This surface is very delicate. If touching or wiping the surface, the polarizing function will be lost due to damage
of the aluminium rib construction on the surface. Extreme care should be taken to handle the polarizer.
Light source side
Screen side
In-coming
side
Polarizer
Out-going
side
Indication of light in-coming side and out-
going side
The indication of "in-coming side" and "out-going side" of
the polarizers or LCD panels is shown in the figure. It in-
dicates the light in-coming and out-going from the light
source.
Cleaning capability of polarizers
● Inorganic polarizer handling
Never grasp the surface or edges of the polarizer with bare hand. If fat and oil on your hand adheres on the edges
of polarizer, the linear bolt may appear on the glass surface due to capillarity. Grasp the edges of the glass with new
gloves or with tweezers when handling it.
● Inorganic polarizer cleaning
When removing the dust on the surface, use a commercial (inert gas) air spray or air blower to remove them. Never
use organic solvents
Type
Wipe cleaning
In-coming
side
Out-going
side
Polarizer
(Out)
R
Inorganic
NG
OK
G
Inorganic
NG
OK
B
Inorganic
NG
OK
Polarizer
(In)
R
Inorganic
OK
NG
G
Inorganic
OK
NG
B
Inorganic
OK
NG
C
C
C
Polarizer (In)
C
R-Polarizer (In)
(Inorganic type)
G-Polarizer (In)
(Inorganic type)
B-Polarizer (In)
(Inorganic type)
C
C
C
3.3. Polarizer (In) removal
1. Remove each 1 hex screw-C on the polarizer holder with a ball pointed driver
(2.0) and take the Polarizer (In) upward off carefully.
Pay attention not to scratch on the sur-
face of the Polarizer (In) when removing
the polarizer.
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